Setting up the pinhole camera

You should be able to see an image of the candle flame or other light source on the screen - try different positions and see what gives the best image.

Investigating your pinhole camera

What do you notice about the image? Why do you think it is like this?

What happens to the size of the image as you move the sheet of paper or screen further away, but with the candle staying still? You could draw a graph of image height (vertical axis) against the distance of the paper or screen from the pinhole camera (horizontal axis).

Look at your graph - what do you think it tells you?

For each pair of measurements, calculate the result when you divide the height of the image by the distance between the camera and the screen or paper. What do you notice? Can you explain this?